# vim: filetype=sh
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#
# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.

. $STF_SUITE/include/libtest.kshlib

#
# According to $elements, $prefix and $separator, the function random produce 
# the number of $counter combination. 
#
# $1 elements which is used to get the combination.
# $2 prefix is appended to the combination
# $3 separator between the combination, such as ' ' or ','
# $4 counter is the number of combination which you want to get.
#
function gen_option_str # $elements $prefix $separator $counter
{
	typeset elements=""
	typeset prefix=${2}
	typeset separator=${3}
	typeset -i counter=${4:-0}
	typeset -i i=0
	typeset comb_str=""

	for e in $1; do
		elements[i]="$e"
		(( i += 1 ))
	done
	(( ${#elements[@]} == 0 )) && log_fail "The elements can't be empty."
	
	typeset -i item=0
	typeset -i j=0
	typeset -i numb_item=0

	# Loop and get the specified number combination strings.
	i=0
	while (( i < counter )); do
		j=0
		numb_item=0
		comb_str=""

		# Get random number items for each combinations.
		(( numb_item = ($RANDOM % ${#elements[@]}) + 1 ))

		while (( j < numb_item )); do
			# Random select elements from the array
			(( item = $RANDOM % ${#elements[@]} ))

			if (( ${#comb_str} == 0 )); then
				comb_str=${elements[item]}
			else
				comb_str=$comb_str$separator${elements[item]}
			fi
			(( j += 1 ))
		done
		
		print "$prefix$comb_str"

		(( i += 1 ))
	done
}

#
# Cleanup the volume snapshot and filesystem snapshot were created for 
# this test case.
#
function cleanup
{
	datasetexists $TESTPOOL/$TESTVOL@$TESTSNAP && \
		destroy_snapshot $TESTPOOL/$TESTVOL@$TESTSNAP
	datasetexists $TESTPOOL/$TESTFS@$TESTSNAP && \
		destroy_snapshot $TESTPOOL/$TESTFS@$TESTSNAP

	[[ -e $TESTFILE0 ]] && log_must $RM $TESTFILE0
}
